Name	Known for
Sian Reese-Williams DCI Cadi John DCI Cadi John See fewer	Cysylltiad (Connection) (2021)
Sion Alun Davies DS Owen Vaughan (as Siôn Alun Davies) DS Owen Vaughan (as Siôn Alun Davies) See fewer	Hidden (2018)
Annes Elwy Mia Owen Mia Owen See fewer	Little Women (2017)
Steffan Cennydd Connor Pritchard Connor Pritchard See fewer	The Pembrokeshire Murders (2021)
Sion Eifion Lee Williams Lee Williams See fewer	Hidden (2018)
Nia Roberts Elin Jones Elin Jones See fewer	Cashback (2006)
Lowri Izzard PC Mari James PC Mari James See fewer	Hidden (2018)
Garmon Rhys PC Ryan Davies PC Ryan Davies See fewer	Hidden (2018)
Victoria Pugh DSI Susan Lynn DSI Susan Lynn See fewer	Torchwood (2006)
Bryn Fôn Hefin Mathews Hefin Mathews See fewer	The Corn Is Green (1979)
Lois Elenid Beca Mathews Beca Mathews See fewer	Hidden (2018)
Owain Gwynn Siôn Wells Siôn Wells See fewer	Apostle (2018)
Lisa Victoria Catrin Pritchard Catrin Pritchard See fewer	Hidden (2018)
Jac Jones Liam Pritchard Liam Pritchard See fewer	Hidden (2018)
Nia Hâf Lois Jones Lois Jones See fewer	Hidden (2018)
Ffion Dafis Kelly Owen Kelly Owen See fewer	Hidden (2018)
Sarah Tempest Alys Mitchell Alys Mitchell See fewer	Hidden (2018)
Mali Tudno Jones Rachel West Rachel West See fewer	35 Diwrnod (2014)
Gruffydd Owain Wyn Jones Jason Williams (as Gruffydd Wyn Jones) Jason Williams (as Gruffydd Wyn Jones) See fewer	Hidden (2018)
Dyfrig Evans Glyn Jones Glyn Jones See fewer	Hidden (2018)
Paul Whitlock Roy (uncredited) Roy (uncredited) See fewer	The Real Prime Suspect (2019)